1. Thoughtful Design Our seat cushion and lumbar pillow are made of high density memory foam with a high quality smooth zipper and soft velvet shell. The seat cushion has a non slip design on the bottom so that it doesn't move once placed on a seat. The cushion maintains its shape even after numerous uses. The seat cushion and lumbar pillow will provide you with comfortable support, help improve your sitting posture, and alleviate sitting fatigue. 2. Applicable Size The seat cushion measures 18.1 x 14.2 x 3.2 inches and the lumbar support pillow measures 13 x 13 x 4 inches, with adjustable straps installed on the back of the lumbar support pillow to fit various sizes of chairs and user heights. The bottom of the cushion also has a s resistant design so that the cushion won't move once placed on a chair. 3. Relieve Hip Pressure Back Pain Lumbar pillow with ergonomic curve, in line with the physical characteristics of adults, seat cushion with ergonomic U shaped design, a perfect fit for the curve of the hip. It can effectively relieve back pain, lumbar pain, sciatica and other problems caused by sitting for long periods. 4. Suitable for Anywhere Seat cushion and lumbar pillow are ideal for long office hours, and will help reduce fatigue and enhance work efficiency. Cushions are also suitable for driving cars, taking trains, flying, playing video games at home, or adding to a wheelchair for a more comfortable experience. The seat cushion and lumbar pillow are made of high quality materials and are a neutral color to match any dcor.